Alzheimer’s disease: a.
marks mental decline or dementia.
b.
results in the progressive deterioration of brain cells.
c.
both a and b.
d.
neither a nor b.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?